fix GetSize for SubmitSolutionJd

the GetSize implementation is not accounting for self.version.get_size()!

that is causing NoiseEncoder to allocate a buffer that's smaller than what is actually needed, which eventually triggers FramingSv2Error(BinarySv2Error(WriteError)) during encoding

protocols/v2/subprotocols/job-declaration/src/submit_solution.rs

@@ -30,5 +30,6 @@ impl<'d> GetSize for SubmitSolutionJd<'d> {
             + self.ntime.get_size()
             + self.nonce.get_size()
             + self.nbits.get_size()
+            + self.version.get_size()
     }
 }